== sanity test 413k: QoS mkdir exclude prefixes ========== 21:30:23 (1784943023)
lmv.lustre-clilmv-ffff996d50758000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff996d50758000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff996d50758000.qos_exclude_prefixes=_temporary